1245145505 has 8 divisors (see below), whose sum is σ = 1495995072. Its totient is φ = 994902768.

The previous prime is 1245145471. The next prime is 1245145507. The reversal of 1245145505 is 5055415421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1245145505 - 2⁸ = 1245145249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245145507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147179 + ... + 155408.

It is an arithmetic number, because the mean of its divisors is an integer number (186999384).

Almost surely, 2^1245145505 is an apocalyptic number.

It is an amenable number.

1245145505 is a deficient number, since it is larger than the sum of its proper divisors (250849567).

1245145505 is an equidigital number, since it uses as much as digits as its factorization.

1245145505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303415.

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 1245145505 is about 35286.6193478491. The cubic root of 1245145505 is about 1075.8210435720.

The spelling of 1245145505 in words is "one billion, two hundred forty-five million, one hundred forty-five thousand, five hundred five".